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Chemical grouting fluid for repairing CO2 leakage of deep stratum and preparation method of chemical grouting fluid

A technology of CO2 and grouting, which is applied in the direction of chemical instruments and methods, other chemical processes, drilling compositions, etc., can solve the problems of difficult injection into micro-cracks, poor formation repair effect, etc., and is beneficial to carbon sequestration and Effect

Active Publication Date: 2022-03-11
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This traditional granular slurry is not only difficult to inject into micro-cracks, but also has poor effect on formation repair

Method used

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  • Chemical grouting fluid for repairing CO2 leakage of deep stratum and preparation method of chemical grouting fluid
  • Chemical grouting fluid for repairing CO2 leakage of deep stratum and preparation method of chemical grouting fluid
  • Chemical grouting fluid for repairing CO2 leakage of deep stratum and preparation method of chemical grouting fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A method for repairing deep formation CO 2 The method for preparing the leaked chemical grouting fluid specifically includes the following steps:

[0046] (1) By weight, 5.7 parts of MgCl 2 Mix and stir evenly with 100 parts of water in the container until it is completely dissolved;

[0047] (2) Add 11.7 parts of catalyst NaCl to the solution in step (1) and stir until the particles are completely dissolved to obtain grouting solution A.

[0048] use Na 2 CO 3 Solution to simulate a leaked carbon source:

[0049] (3) 6.4 parts of Na 2 CO 3 Stir evenly with 100 parts of water in a new container until it is completely dissolved;

[0050] (4) Repeat step (1-3) process 5 times, mix the solution obtained in step (2-3) in the container, place the container in a preheated incubator (200°C), and start 5 chemical Response test. The reacted solids were taken out after 1, 2, 3, 5, and 7 hours of reaction respectively, and the content of magnesite was quantitatively analy...

Embodiment 2

[0052] A method for repairing deep formation CO 2 The method for preparing the leaked chemical grouting fluid specifically includes the following steps:

[0053] (1) By weight, 5.7 parts of MgCl 2 Mix and stir evenly with 100 parts of water in the container until it is completely dissolved;

[0054] (2) Add 17.5 parts of catalyst NaCl to the solution in step (1) and stir until the particles are completely dissolved to obtain grouting solution A.

[0055] use Na 2 CO 3 Solution to simulate a leaked carbon source:

[0056] (3) 6.4 parts of Na 2 CO 3 Stir evenly with 100 parts of water in a new container until it is completely dissolved;

[0057] (4) Repeat step (1-3) process 5 times, mix the solution obtained in step (2-3) in the container, place the container in a preheated incubator (200°C), and start 5 chemical Response test. The reacted solids were taken out after 1, 2, 3, 5, and 7 hours of reaction respectively, and the content of magnesite was quantitatively analy...

Embodiment 3

[0059] A method for repairing deep formation CO 2 The method for preparing the leaked chemical grouting fluid specifically includes the following steps:

[0060] (1) By weight, 5.7 parts of MgCl 2 Mix and stir evenly with 100 parts of water in the container until it is completely dissolved;

[0061] (2) Add 23.4 parts of catalyst NaCl to the solution in step (1) and stir until the particles are completely dissolved to obtain grouting solution A.

[0062] use Na 2 CO 3 Solution to simulate a leaked carbon source:

[0063] (3) 6.4 parts of Na 2 CO 3 Stir evenly with 100 parts of water in a new container until it is completely dissolved;

[0064] (4) Repeat step (1-3) process 5 times, mix the solution obtained in step (2-3) in the container, place the container in a preheated incubator (200°C), and start 5 chemical Response test. And after reacting for 1, 2, 3, 5, and 7 hours, the reacted solids were taken out, and the content of magnesite was quantitatively analyzed by ...

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Abstract

The invention discloses chemical grouting liquid for repairing CO2 leakage of a deep stratum and a preparation method of the chemical grouting liquid, belongs to the field of carbon dioxide capture and emission reduction, and aims at repairing faults and cracks of a deep CO2 geological storage and solving the problem of CO2 leakage through acid-resistant carbonate mineral particles formed by chemical reaction of the grouting liquid and leaked CO2. The reactive grouting fluid disclosed by the invention is green, environment-friendly, economical and simple to operate, can overcome the precipitation kinetic limitation of acid-resistant magnesite particles, and catalyzes the rapid precipitation of the acid-resistant magnesite particles in a CO2 leakage area of a deep stratum; and the reactive grouting fluid has the characteristics of low viscosity and wide permeation range, so that the reactive grouting fluid can enter fine pores and cracks and becomes a promising reactive grouting fluid. The method can provide an effective chemical solution for leakage repair and fault healing of the deep CO2 geological repository, and is suitable for popularization and application.

Description

technical field [0001] The invention relates to the field of carbon dioxide capture and emission reduction, in particular to a CO 2 Spilled chemical grout and how to prepare it. Background technique [0002] CO to be captured 2 Storage in deep geological storage is an effective way to control global warming, while CO 2 Long-term leakage (through faults, high-permeability zones, fractures) will lead to failure of carbon sequestration projects. Due to the high viscosity of the cement slurry in the traditional cement grouting method, a high-pressure grouting method is required to realize the injection of the slurry. This traditional granular slurry is not only difficult to inject into micro-cracks, but also has poor effect on formation repair. And the grouting material produces small pores due to bleeding and evaporation during its solidification process. However, natural rocks have narrow pores and fractures, and because the aqueous solution with low viscosity can pass th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/42C09K8/504C09K3/12C01F5/24
CPCC09K8/426C09K8/504C09K8/5045C09K3/12C01F5/24C01P2002/72Y02C20/40
Inventor 季雨坤李晓昭李福清王钦科李瑞林王海航陈君赵鹏干沁李福峰
Owner CHINA UNIV OF MINING & TECH
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